Lub taub hau luam ntawv no muaj qhov ua tau zoo heev rau cov khoom siv ceev ceev thiab kev luam ntawv zoo, thiab tau siv rau hauv ntau lub lag luam thiab kev lag luam luam ntawv.

Tag nrho peb cov printhead yog thawj thiab tshiab, ib zaug koj tau txais, thov xyuas pob thiab printhead zoo ua ntej nruab nrog tus number case thiab txhua yam teeb meem tuaj yeem tham nrog kuv thiab rov qab los .Ib zaug ntsia nrog number case, tsis tuaj yeem rov qab.